Sony has just started rolling out a new Android 4.4.2 KitKat update with build number 14.3.A.0.761 to Xperia Z1, starting with China. The Xperia Update Checker reveals that the update is currently available only for the C6902 model of Xperia Z1, as Sony has currently released this firmware only in China while other countries are likely to get the update shortly. Check out the screenshot …